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latent error

la·tent er·ror

/ˈlātnt ˈerər/

Noun

A system defect, such as poor design, incorrect installation, faulty maintenance, poor purchasing decisions, and inadequate staffing. These are difficult to measure because they occur over broad ranges of time and space and they may exist for days, months, or even years before they lead to a more apparent error or adverse event directly related to patient care. Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1494808/